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Caution:
Perform this procedure during a maintenance window.
Caution:
Prior to adding or replacing the high‑speed source and composite clock cables,
perform an EAGLE system health check.
Caution:
HS clock alarms are only generated for ATM LIM cards and E1/T1 MIM if the card is
provisioned to use the HS clock.
Caution:
Always replace the IDLE clock cable first, whether it's the primary or secondary
cable position. After the replacement of the first (Idle) cable position, ensure the
system reports the clock status properly with an active and idle clock output. If the
output reports the correct status you are know able to replace the active cable
which will force the system to use the new clock cable (idle) position and it will
transition state to active.
Caution:
Connectors ACLK3 and ACLK4 propagate system A clocks to frame 3 (shelves
4100, 4200, and 4300) and frame 4 (shelves 5100, 5200, 5300). System A clock
signals to cards in these shelves will be lost during this procedure. If the EAGLE
contains these shelves with cards installed the cards switch automatically to the
system B clock sources when the A clock sources are removed.
Note:
In this procedure, the high‑speed clock status indicated in the output of the rept-
stat-clk command reflects the presence of at least one ATM LIM card or E1/T1
MIM in the system. The status fields remain empty until the card is configured to
use the high‑speed clock.
Procedure — Replace or Add HS source Timing Clock Cables with:backplane (P/
N 850‑0330‑03/04)
Prior to cable replacement, check your system for any troubles. At the EAGLE terminal,
1.
enter:
rept-stat-trbl
Chapter 6
Source Timing
6-71
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